Shoulder Implant Components

ABSTRACT

A shoulder implant system includes a humeral stem implant, a humeral neck implant component, a humeral head implant component, and a glenoid implant. The humeral stem implant has a fin coupled to an exterior surface thereof that is inwardly tapered at an angle relative to vertical. At least a portion of the fin forms a wedge that directly engages and compacts cancellous bone during installation of the humeral stem implant. The humeral neck implant component is configured to be coupled with the humeral stem implant. The humeral head implant component is configured to be coupled to the humeral stem implant via the humeral neck implant component. The glenoid implant has a plurality of peripheral pegs. Each of the peripheral pegs has a plurality of sets of resilient lobes.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of and priority to U.S. ProvisionalApplication No. 62/448,205, filed Jan. 19, 2017, which is herebyincorporated by reference herein in its entirety.

COPYRIGHT

A portion of the disclosure of this patent document contains materialwhich is subject to copyright protection. The copyright owner has noobjection to the facsimile reproduction by anyone of the patentdisclosure, as it appears in the Patent and Trademark Office patentfiles or records, but otherwise reserves all copyright rightswhatsoever.

FIELD OF THE INVENTION

The present disclosure relates generally to shoulder implant systemsand, more particularly, to a shoulder implant systems with a humeralstem implant and a glenoid implant.

BACKGROUND

People experiencing shoulder joint pain can find relief by way of ashoulder replacement surgery that replaces one or more portions of theperson's anatomy with one or more implant components. In some suchcases, an upper portion of a patient's humerus (e.g., a portion of thehumeral head) is cut. Then the humerus is cored and prepped to receive astem implant therein. Some prior stem implants have a relatively longbody that enters into the diaphysis region of the humerus to aid inaligning the stem implant during installation and can thus end upengaging the cortical bone, which can be undesirable.

The stem implant is inserted/installed in the prepped humerus andcoupled with a humeral neck implant component and a humeral head implantcomponent, the combination thus generally replacing the natural humeralhead of the patient's humerus.

In some patients, the glenoid of the patient is replaced by a glenoidimplant for the humeral head implant component to bear against duringmovement of the patient's arm. Prior glenoid implants typically requirethe patient's glenoid to be prepped by shaving the surface and drillinga set of bores or holes therein to receive pegs of the glenoid implantto aid in retaining the glenoid implant in place. The glenoid implant istypically cemented in place by a surgeon positioning the glenoid implantin place and holding it there until the bone cement cures.

The present disclosure is directed at solving and/or improving the abovenoted deficiencies along with solving other problems.

SUMMARY OF THE INVENTION

According to some implementations of the present disclosure, a humeralstem implant includes a lower stem portion, an upper stem portion, afirst pair of fins, and a second pair of fins. The lower stem portionhas a central axis. The upper stem portion extends from the lower stemportion and has a tapered face that is angled relative to the centralaxis of the lower stem portion. The first pair of fins extends from anexterior surface of the upper stem portion for providing rotationalstability to the humeral stem implant by engaging cancellous bone. Thesecond pair of fins extends from the exterior surface of the upper stemportion for providing rotational stability to the humeral stem implantby engaging cancellous bone. The second pair of fins is generallylocated on an opposite side of the upper stem portion relative to thefirst pair of fins.

According to some implementations of the present disclosure, a humeralstem implant includes a lower stem portion, an upper stem portion, afirst pair of parallel fins, and a second pair of parallel fins. Thelower stem portion has a central axis. The upper stem portion extendsfrom the lower stem portion and has a tapered face that is angledrelative to the central axis of the lower stem portion. The first pairof parallel fins is coupled to a posterior portion of an exteriorsurface of the upper stem portion. The second pair of parallel fins iscoupled to an anterior portion of the exterior surface of the upper stemportion. The first pair of parallel fins and the second pair of parallelfins are configured to provide rotational stability to the humeral stemimplant by directly engaging cancellous bone responsive to the humeralstem implant being seated in a humeral canal of a prepared humerus boneof a patient.

According to some implementations of the present disclosure, a humeralstem implant includes a lower stem portion, an upper stem portion, afirst longitudinal fin, a second longitudinal fin, and a biologicingrowth coating. The lower stem portion has a central axis. The upperstem portion extends from the lower stem portion and has a tapered facethat is angled relative to the central axis of the lower stem portion.The first longitudinal fin has a first central axis and a first lengthand is coupled to a posterior portion of an exterior surface of theupper stem portion such that the first longitudinal fin forms a firstwindow that is configured to receive a suture therethrough. The firstlongitudinal fin tapers inwardly such that the first central axis is ata first angle relative to the central axis of the lower stem portion.The second longitudinal fin has a second central axis and a secondlength and is coupled to the posterior portion of the exterior surfaceof the upper stem portion such that the second longitudinal fin forms asecond window that is configured to receive a suture therethrough. Thesecond longitudinal fin tapers inwardly such that the second centralaxis is at a second angle relative to the central axis of the lower stemportion. The second angle is different than the first angle. The secondlength is less than half of the first length. The first longitudinal finand the second longitudinal fin are configured to provide rotationalstability to the humeral stem implant by directly engaging cancellousbone responsive to the humeral stem implant being seated in a humeralcanal of a prepared humerus bone of a patient. The biologic ingrowthcoating is attached to a majority portion of the exterior surface of theupper stem portion such that the biologic ingrowth coating extendsdownward from the tapered face at least one millimeter beyond the firstlongitudinal fin.

According to some implementations of the present disclosure, a humeralstem implant includes a lower stem portion, an upper stem portion, andan elongated fin. The lower stem portion has a central axis. The upperstem portion extends from the lower stem portion and has a tapered facethat is angled relative to the central axis of the lower stem portion.The elongated fin is coupled to an exterior surface of the upper stemportion. The elongated fin is inwardly tapered at an angle relative tothe central axis of the lower stem portion. At least a portion of theelongated fin forms a wedge that directly engages and compactscancellous bone during installation of the humeral stem implant.

According to some implementations of the present disclosure, a glenoidimplant that is to be coupled with a prepared glenoid of a patientincludes a body, a central peg, and a peripheral peg. The body has aconcave surface configured to engage a humeral head implant component,and a convex surface configured to engage a mating surface of theprepared glenoid of the patient. The convex surface has a peripheralarea surrounding a central area. The central peg extends from thecentral area of the convex surface. The central peg is configured to becemented to a central bore of the prepared glenoid of the patient. Theperipheral peg extends from the peripheral area of the convex surface.The peripheral peg has a first set of resilient lobes at a firstlongitudinal position of the peripheral peg and a second set ofresilient lobes at a second longitudinal position of the peripheral pegthat is spaced from the first longitudinal position.

According to some implementations of the present disclosure, a glenoidimplant is provided that is to be coupled with a prepared glenoid of apatient. The prepared glenoid has a mating surface, a central bore, anda peripheral bore. The glenoid implant includes a body, a central peg,and a peripheral peg. The body has a concave surface configured toengage a humeral head implant component, and a convex surface configuredto engage the mating surface of the prepared glenoid of the patient. Theconvex surface has a peripheral area surrounding a central area. Thecentral peg extends from the central area of the convex surface. Thecentral peg is configured to be cemented to the central bore of theprepared glenoid of the patient. The peripheral peg extends from theperipheral area of the convex surface. The peripheral peg has a firstradially extending feature positioned at a first longitudinal positionof the peripheral peg and a second radially extending feature positionedat a second longitudinal position of the peripheral peg that is spacedfrom the first longitudinal position. The first radially extendingfeature has three lobes that are spaced about a circumference of theperipheral peg in a first rotational orientation. The second radiallyextending feature has three lobes that are spaced about thecircumference of the peripheral peg with a second rotational orientationthat is angularly offset from the first rotational orientation.

According to some implementations of the present disclosure, a glenoidimplant includes a body, a central peg, and a plurality of peripheralpegs. The body has a first side with a concave surface and a secondopposing side with a convex surface. The convex surface is configured toengage a prepared glenoid of a patient. The convex surface has aperipheral area surrounding a central area. The central peg extends fromthe central area of the convex surface. The plurality of peripheral pegsextends from the peripheral area of the convex surface. Each of theplurality of peripheral pegs has at least a first set of resilient lobesat a first longitudinal position and a second set of resilient lobes ata second longitudinal position spaced from the first longitudinalposition.

According to some implementations of the present disclosure, a glenoidimplant includes a body, a central peg, and a plurality of peripheralpegs. The body has a first side with a concave surface and a secondopposing side with a convex surface. The convex surface is configured toengage a prepared glenoid of a patient. The convex surface has aperipheral area surrounding a central area. The central peg extends fromthe central area of the convex surface. The plurality of peripheral pegsextends from the peripheral area of the convex surface. Each of theplurality of peripheral pegs has a plurality of radially extendingfeatures. Each of the plurality of radially extending features has threelobes that are spaced about a circumference of the respective one of theplurality of peripheral pegs. The three lobes of a first portion of theplurality of radially extending features have a first rotationalorientation. The three lobes of a second portion of the plurality ofradially extending features have a second rotational orientation that isangularly offset from the first rotational orientation. The three lobesof a third portion of the plurality of radially extending features havea third rotational orientation that is angularly offset from the firstand the second rotational orientations.

According to some implementations of the present disclosure, a glenoidimplant is provided that is to be coupled with a prepared glenoid of apatient. The prepared glenoid has a mating surface, a central bore, anda peripheral bore. The glenoid implant includes a body, a central peg,and a peripheral peg. The body has a concave surface configured toengage a humeral head implant component, and a convex surface configuredto engage the mating surface of the prepared glenoid of the patient. Theconvex surface has a peripheral area surrounding a central area. Thecentral peg extends from the central area of the convex surface. Thecentral peg is configured to be affixed to the central bore of theprepared glenoid of the patient. The peripheral peg extends from theperipheral area of the convex surface. The peripheral peg has at leastone radially extending feature. Responsive to at least a portion of theconvex surface directly engaging the mating surface of the preparedglenoid, the at least one radially extending feature of the peripheralpeg is configured to engage cancellous bone of the prepared glenoid andprovide a sufficient amount of self-pressurization such that bone cementbetween the central peg and the central bore can cure with the at leasta portion of the convex surface maintaining its direct engagement withthe mating surface of the prepared glenoid without an external forcebeing applied to the glenoid implant.

According to some implementations of the present disclosure, a method ofmaking a glenoid implant includes providing a stock glenoid component.The stock glenoid component including a body, a central peg, and aperipheral peg. The body has a first side with a concave surface and asecond opposing side with a convex surface. The convex surface has aperipheral area surrounding a central area. The central peg extends fromthe central area of the convex surface. The peripheral peg extends fromthe peripheral area of the convex surface. The peripheral peg has agenerally cylindrical portion. The generally cylindrical portion of theperipheral peg is cut, via at least one of one or more tools, therebycreating a plurality of radially extending disks. The created pluralityof radially extending disks is cut, via at least one of the one or moretools, in one or more helical patterns with respect to a central axis ofthe peripheral peg, thereby modifying each of the plurality of radiallyextending disks to have three lobes that are spaced about acircumference of the peripheral peg.

According to some implementations of the present disclosure, a method ofinstalling a glenoid implant in a prepared glenoid of a patient isdescribed. The prepared glenoid has a mating surface, a central bore,and a plurality of peripheral bores. The method includes providing aglenoid implant. The provided glenoid implant includes a body, a centralpeg, and a plurality of peripheral pegs. The body has a first side witha concave surface and a second opposing side with a convex surface. Theconvex surface has a peripheral area surrounding a central area. Thecentral peg extends from the central area of the convex surface. Theplurality of peripheral pegs extends from the peripheral area of theconvex surface. Each of the peripheral pegs has at least one radiallyextending feature. Bone cement is applied to at least a portion of thecentral peg. The glenoid implant is positioned, via at least one of oneor more tools, such that: (i) at least a portion of the convex surfacedirectly engages the mating surface of the prepared glenoid, (ii) thecentral peg is positioned within the central bore of the preparedglenoid, and (iii) each of the plurality of peripheral pegs ispositioned within a respective one of the peripheral bores of theprepared glenoid. The at least one of the one or more tools isdisengaged from the glenoid implant prior to the bone cement applied tothe at least a portion of the central peg curing. While the bone cementcures, the position of the glenoid implant is maintained relative to theprepared glenoid via the at least one radially extending feature of theplurality of peripheral pegs.

According to some implementations of the present disclosure, a shoulderimplant system includes a humeral stem implant, a humeral neck implantcomponent, a humeral head implant component, and a glenoid implant. Thehumeral stem implant has a fin that is coupled to an exterior surfacethereof. The fin is inwardly tapered at an angle relative to vertical.At least a portion of the fin forms a wedge that directly engages andcompacts cancellous bone during installation of the humeral stemimplant. The humeral neck implant component is configured to be coupledwith the humeral stem implant such that a portion of the humeral neckimplant component protrudes from an angled face of the humeral stemimplant. The humeral head implant component is configured to be coupledto the portion of the humeral neck implant component that protrudes fromthe angled face of the humeral stem implant. The glenoid implant has aconcave surface configured to engage the humeral head implant component.

According to some implementations of the present disclosure, a shoulderimplant system includes a humeral stem implant, a humeral neck implantcomponent, a humeral head implant component, and a glenoid implant. Thehumeral stem implant has an interior bore. The humeral neck implantcomponent is configured to be coupled with the humeral stem implant viathe interior bore such that a portion of the humeral neck implantcomponent protrudes from the humeral stem implant. The humeral headimplant component is configured to be coupled to the portion of thehumeral neck implant component that protrudes from the humeral stemimplant. The glenoid implant has a body, a central peg, and a peripheralpeg. The body has a first side with a concave surface and a secondopposing side with a convex surface. The concave surface is configuredto engage the humeral head implant component. The convex surface isconfigured to engage a prepared glenoid of a patient. The convex surfacehas a peripheral area surrounding a central area. The central pegextends from the central area of the convex surface and the peripheralpeg extends from the peripheral area of the convex surface. Theperipheral peg has a first set of resilient lobes at a firstlongitudinal position and a second set of resilient lobes at a secondlongitudinal position spaced from the first longitudinal position.

Additional aspects and implementations of the present disclosure will beapparent to those of ordinary skill in the art in view of the detaileddescription of various implementations, which is made with reference tothe drawings, a brief description of which is provided below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is an assembled perspective view of a shoulder implant systemaccording to some implementations of the present disclosure;

FIG. 1B is an assembled side cross-sectional view of the shoulderimplant system of FIG. 1A;

FIG. 2A is a first exploded perspective view of the shoulder implantsystem of FIG. 1A;

FIG. 2B is a second exploded perspective view of the shoulder implantsystem of FIG. 1A;

FIG. 3 is a perspective view of a glenoid implant of the shoulderimplant system of FIG. 1A according to some implementations of thepresent disclosure;

FIG. 4A is a partial perspective view of a peripheral peg of the glenoidimplant of FIG. 3;

FIG. 4B is a plan view of the peripheral peg of FIG. 4A;

FIG. 4C is a cross-sectional view of the peripheral peg of FIG. 4B takenat line 4C-4C;

FIG. 4D is a cross-sectional view of the peripheral peg of FIG. 4B takenat line 4D-4D;

FIG. 4E is a cross-sectional view of the peripheral peg of FIG. 4B takenat line 4E-4E;

FIG. 4F is a cross-sectional view of the peripheral peg of FIG. 4B takenat line 4F-4F;

FIG. 4G is a cross-sectional view of the peripheral peg of FIG. 4B takenat line 4G-4G;

FIG. 5A is a perspective view of the peripheral peg of FIG. 4A with aplurality of radially extending features exploded therefrom to betterillustrate the radially extending features according to someimplementations of the present disclosure;

FIG. 5B is an enlarged perspective view of one of the plurality ofradially extending features of FIG. 5A;

FIG. 6A is a side view illustrating a tool starting to form a peripheralpeg according to some implementations of the present disclosure;

FIG. 6B is a perspective view of a partially formed version of theperipheral peg of FIG. 6A;

FIG. 6C is a side view illustrating a tool modifying the partiallyformed version of the peripheral peg of FIG. 6B by creating a pluralityof radially extending disk features therein;

FIG. 6D is a perspective view of the modified peripheral peg of FIG. 6Chaving the plurality of radially extending disk features;

FIG. 6E is a side view illustrating a tool creating a helical groove inthe plurality of radially extending disk features of the modifiedperipheral peg of FIG. 6D;

FIG. 6F is a perspective view of the modified peripheral peg of FIG. 6Ehaving the plurality of radially extending disk features with a helicalgroove cut therein;

FIG. 6G is a side view illustrating a tool creating a second helicalgroove in the plurality of radially extending disk features of themodified peripheral peg of FIG. 6F;

FIG. 6H is a perspective view of the modified peripheral peg of FIG. 6Ghaving the plurality of radially extending disk features with thehelical groove and the second helical groove cut therein thereby formingeach of the plurality of radially extending disk features into threeresilient lobes according to some implementations of the presentdisclosure;

FIG. 7A is a front or medial perspective view of a humeral stem implantof the shoulder implant system of FIG. 1A according to someimplementations of the present disclosure;

FIG. 7B is a rear or lateral perspective view of the humeral stemimplant of FIG. 7A;

FIG. 7C is a front or medial plan view of the humeral stem implant ofFIG. 7A;

FIG. 7D is a rear or lateral plan view of the humeral stem implant ofFIG. 7A;

FIG. 7E is a side (posterior or anterior) plan view of the humeral stemimplant of FIG. 7A;

FIG. 7F is a partial cross-sectional view of the humeral stem implant ofFIG. 7E taken at line 7F-7F;

FIG. 7G is a cross-sectional view of the humeral stem implant of FIG. 7Etaken at line 7G-7G;

FIG. 7H is a partial cross-sectional view of the humeral stem implant ofFIG. 7E taken at line 7H-7H; and

FIG. 7I is a partial cross-sectional view of the humeral stem implant ofFIG. 7E taken at line 71-71.

While the present disclosure is susceptible to various modifications andalternative forms, specific implementations have been shown by way ofexample in the drawings and will be described in detail herein. Itshould be understood, however, that the present disclosure is notintended to be limited to the particular forms disclosed. Rather, thepresent disclosure is intended to cover all modifications, equivalents,and alternatives falling within the spirit and scope of the presentdisclosure as defined by the appended claims.

DETAILED DESCRIPTION

While this disclosure is susceptible to embodiment in many differentforms, there is shown in the drawings and will herein be described indetail preferred implementations of the disclosure with theunderstanding that the present disclosure is to be considered as anexemplification of the principles of the disclosure and is not intendedto limit the broad aspect of the disclosure to the implementationsillustrated.

Referring generally to FIGS. 1A-2B, a shoulder implant system 100includes a humeral stem implant 110, a humeral neck implant component210, a humeral head implant component 250, and a glenoid implant 310.Generally, the humeral stem implant 110 is installed/implanted in aprepared humerus bone of a patient such that a portion (e.g., a taperedface 132 shown in FIG. 7A) of the humeral stem implant 110 remainsexposed to be coupled with a first end portion 212 a (FIGS. 2A and 2B)of the humeral neck implant component 210. As such, a second opposingend portion 212 b of the humeral neck implant component 210 is exposedand protruding such that the humeral head implant component 250 can becoupled thereto (best shown in FIG. 1B).

The humeral neck implant component 210 has the first end portion 212 a,the second end portion 212 b, a central portion 214, and a throughbore220 (best shown in FIG. 1B). The first end portion 212 a has a generallytapered cylindrical shape such that the humeral neck implant component210 can mate with an interior bore 135 of the humeral stem implant 110in a taper lock configuration (e.g., a morse taper lock). Specifically,the first end portion 212 a tapers inwardly in a direction along acentral axis X_(N) of the humeral neck implant component 210 from thecentral portion 214 towards the first end portion 212 a. Similarly, thesecond end portion 212 b has a generally tapered cylindrical shape suchthat the humeral neck implant component 210 can mate with the humeralhead implant component 250 in a taper lock configuration (e.g., a morsetaper lock). Specifically, the second end portion 212 b tapers inwardlyin a direction along the central axis X_(N) of the humeral neck implantcomponent 210 from the central portion 214 towards the second endportion 212 b.

As shown, the second end portion 212 b has a relatively larger outermaximum diameter as compared with the first end portion 212 a, althoughthe reverse is contemplated. In some such implementations, thedifference in outer maximum diameters of the first end portion 212 a andsecond end portion 212 b aids in the proper coupling of the humeral neckimplant component 210 to the humeral stem implant 110 and the humeralhead implant component 250.

The throughbore 220 of the humeral neck implant component 210 permits atool to be positioned therethrough to aid in removing the humeral neckimplant component 210 from an engagement (e.g., taper lock engagement)with the humeral stem implant 110. In some alternative implementations,the humeral neck implant component 210 does not include the throughbore220.

While the humeral neck implant component 210 is shown as having aparticular shape (i.e., generally cylindrical) and size, it iscontemplated that the humeral neck implant component 210 can have avariety of other shapes and/or sizes. For example, the humeral neckimplant component 210 can have a non-rotational shape, such as, forexample, a generally rectangular cuboid shape, a generally clover shapedcross-section, a generally triangular shaped cross-section, etc., or anycombination thereof.

The humeral head implant component 250 has a generally convex outersurface 255 (best shown in FIG. 2A), a generally flat inner surface 260(best shown in FIG. 2B), an interior bore 270 (best shown in FIG. 2B),and an outer flange 280 (best shown in FIG. 1B). The generally convexouter surface 255 has a generally semi-spherical shape and is forengaging a corresponding concave surface 322 (FIG. 2B) of the glenoidimplant 310 during operation of the shoulder implant system 100 in apatient.

The interior bore 270 of the humeral head implant component 250 is forengaging the second end portion 212 b of the humeral neck implantcomponent 210 in the taper lock configuration (e.g., a morse taper lock)as described above. As such, the interior bore 270 also tapers inwardlyin the direction along the central axis X_(N) of the humeral neckimplant component 210 from the central portion 214 towards the secondend portion 212 b, as shown in FIG. 1B.

The generally flat inner surface 260 is set back from (i.e., recessed)an edge 285 (FIG. 1B) of the outer flange 280 such that the generallyflat inner surface 260 does not directly engage or otherwise touch thehumeral stem implant 110(i) during installation of the humeral headimplant component 250 onto the humeral neck implant component 210, whichcould impede the taper lock from securing therebetween and/or (ii) whenthe humeral head implant component 250 is fully engaged with or fullyseated on the humeral neck implant component 210. In some suchimplementations, the interior bore 270 of the humeral head implantcomponent 250 and the second end portion 212 b of the humeral neckimplant component 210 are configured such that a gap, G, is maintainedbetween the generally flat inner surface 260 and the tapered face 132(FIG. 7A) of the humeral stem implant 110. The gap, G, can be, forexample, between about half of a millimeter and about three millimeters,between about half of a millimeter and about two millimeters, betweenabout half of a millimeter and about one millimeter, about onemillimeter, etc. In some implementations, the gap, G, also provides aspace such that the humeral head implant component 250 can move (e.g.,flex, tilt, etc.) relative to the humeral stem implant 110 wheninstalled in a patient.

Generally referring to FIGS. 3-4G, the glenoid implant 310 includes abody 320, a central peg 330, and three peripheral pegs 350 (although anynumber of peripheral pegs is contemplated, such as, for example, oneperipheral peg, two peripheral pegs, four peripheral pegs, fiveperipheral pegs, etc.). The body 320 of the glenoid implant 310 has anirregular shape that generally corresponds to the shape of the naturalglenoid cavity or natural glenoid fossa of the scapula of a patient. Insome implementations, the cross-sectional shape of the body 320 isgenerally egg shaped.

The body 320 has a laterally facing concave surface 322 (best shown inFIG. 2B) for engaging the humeral head implant component 250. The body320 also has a medially facing convex surface 324 (best shown in FIG. 3)for engaging a mating surface of a prepared glenoid of a patient (e.g.,a shaved and/or drilled glenoid cavity of the patient). The convexsurface 324 generally has a peripheral area 325 b surrounding a centralarea 325 a. The central area 325 a includes the geometric center of theconvex surface 324 and a portion of the convex surface 324 surroundingthe geometric center. In some implementations, the central area 325 aincludes between about five percent and about thirty percent of thetotal surface area of the convex surface 324 and the peripheral area 325b is the balance. In some implementations, the central area 325 aincludes between about ten percent and about twenty-five percent of thetotal surface area of the convex surface 324 and the peripheral area 325b is the balance. In some implementations, the central area 325 aincludes between about fifteen percent and about twenty percent of thetotal surface area of the convex surface 324 and the peripheral area 325b is the balance. The central area 325 a is shown as being a generallycircular area about the central peg 330, although the central area 325 acan have any shape (e.g., oval, square, triangle, polygon, etc., or anycombination thereof). The body 320 of the glenoid implant 310 also hasan edge surface 326 that extends between the concave surface 322 and theconvex surface 324. The edge surface 326 varies based on the thicknessof the body 320.

The glenoid implant 310 is a single monolithic part. In someimplementations, the glenoid implant 310 is milled from a solid block ofmaterial. In some other implementations, the glenoid implant 310 is madeby a 3D printer that prints the glenoid implant 310 as a singlemonolithic part. Alternatively, the glenoid implant 310 is notmonolithic. In some such alternative implementations, the body 320 ofthe glenoid implant 310 is a first component that is attached to thecentral peg 330 and the peripheral pegs 350, which are separatecomponents, respectively. The glenoid implant 310 can be made from anymaterial, such as, for example, plastic (e.g., polyethylene, highdensity polyethylene, ultra high density polyethylene, etc.), metal(e.g., stainless steel, nickel, titanium, etc.), ceramic, or anycombination thereof.

The central peg 330 has a central axis X_(C) (FIG. 3) and each of thethree peripheral pegs 350 has a respective central axis X_(P1), X_(P2),and X_(P3) (FIG. 3). The central axis X_(C) is generally parallel toeach of the central axes X_(P1), X_(P2), and X_(P3), such that theglenoid implant 310 can be installed in a single medial directioncausing the central peg 330 and the three peripheral pegs 350 to enterand engage respective bores drilled into the prepared glenoid of thepatient at about the same time (e.g., the central peg 330 enters firstdue to its relatively larger height/length).

The central peg 330 has a cylindrically shaped body 331. Thecylindrically shaped body 331 has a first end that is integral with thebody 320 of the glenoid implant 310 and a second opposing end that formsa rounded and/or tapered tip portion 332 of the central peg 330. The tipportion 332 of the central peg 330 aids the central peg 330 in engagingand entering a central bore (not shown) in the prepared glenoid duringthe installation of the glenoid implant 330.

The central peg 330 has a multitude of fins 340 extending from thecylindrically shaped body 331 of the central peg 330. The fins 340 arerigid and do not bend or deflect or deform or otherwise move relative tothe cylindrically shaped body 331 when the glenoid implant 310 isinstalled (e.g., causing the central peg 330 to be positioned in thecentral bore of the prepared glenoid of the patient). The fins 340 arespaced along a length/height of the cylindrically shaped body 331 andabout a circumference of the cylindrically shaped body 331 such that oneor more channels 342 (e.g., two vertical channels, three verticalchannels, etc.) are formed between the fins 340. The fins 340 and thechannels 342 provide surfaces, grooves, and/or undercuts for engagingand/or holding bone cement (not shown) for use in securing the centralpeg 330 to the central bore of the prepared glenoid of the patient.

In some implementations, the central bore of the prepared glenoid has aninternal diameter that is larger than a maximum outer diameter of thecentral peg 330 (including the fins 340). As such, a relatively largerbone cement mantle can be formed to aid in rigidly coupling the centralpeg 330 to the central bore of the prepared glenoid of the patient. Insome alternative implementations, the central bore of the preparedglenoid has an internal diameter that is about equal to or slightlysmaller than the maximum outer diameter of the central peg 330(including the fins 340). In some such alternative implementations, thefins 340 are engaged and slightly compressed by the central bore, butthe fins 340 generally do not bend or deflect or deform or otherwisemove relative to the cylindrically shaped body 331.

The central peg 330 has a height/length and the maximum outer diameter.In some implementations, the height of the central peg 330 is betweenabout five millimeters and about thirty millimeters. In some otherimplementations, the height of the central peg 330 is between about tenmillimeters and about twenty-five millimeters. In some implementations,the height of the central peg 330 is about fifteen millimeters. In someimplementations, the maximum outer diameter of the central peg 330(including the fins 340) is between about one millimeter and about eightmillimeters. In some other implementations, the maximum outer diameterof the central peg 330 is between about two millimeters and about sixmillimeters. In some other implementations, the maximum outer diameterof the central peg 330 is between about three millimeters and about fivemillimeters.

Similarly to the central peg 330, each of the peripheral pegs 350 has acylindrically shaped body 351. The cylindrically shaped body 351 has afirst end that is integral with the body 320 of the glenoid implant 310and a second opposing end that forms a rounded and/or tapered tipportion 352 (best shown in FIG. 4A) of the peripheral peg 350. The tipportion 352 of the peripheral peg 350 aids the peripheral peg 350 inengaging and entering a respective peripheral bore (not shown) in theprepared glenoid during the installation of the glenoid implant 330.

Each of the peripheral pegs 350 has a multitude of radially extendingfeatures 360 (FIG. 3) extending from the cylindrically shaped body 351of the peripheral peg 350. As best shown in FIG. 4A, each of theperipheral pegs 350 has four radially extending features 360 a-dextending from the cylindrically shaped body 351, although, each of theperipheral pegs 350 can have any number of radially extending features360 (e.g., one radially extending feature, two radially extendingfeatures, three radially extending features, five radially extendingfeatures, etc.). The four radially extending features 360 are positionedat four longitudinal positions of the cylindrically shaped body 351 ofthe peripheral peg 350.

Specifically, as shown in FIG. 4A, a first one of the radially extendingfeatures 360 a is positioned at a first longitudinal position of theperipheral peg 350 that is closest to the convex surface 324 (FIG. 3) ofthe body 320 of the glenoid implant 310. A second one of the radiallyextending features 360 b is positioned at a second longitudinal positionof the peripheral peg 350 that is directly adjacent to and more distalthan the first radially extending feature 360 a. A third one of theradially extending features 360 c is positioned at a third longitudinalposition of the peripheral peg 350 that is directly adjacent to thesecond radially extending feature 360 b and more distal than the firstand the second radially extending features 360 a, 360 b. A fourth one ofthe radially extending features 360 d is positioned at a fourthlongitudinal position of the peripheral peg 350 that is directlyadjacent to the third radially extending feature 360 c and more distalthan the first, the second, and the third radially extending features360 a, 360 b, 360 c. Further, the radially extending features 360 a-dare separated from one another along the cylindrically shaped body 351of the peripheral peg 350 such that a portion of the cylindricallyshaped body 351 is exposed between the radially extending features 360a-d. As such, the radially extending features 360 have clearance to bendand or deflect.

Each of the radially extending features 360 has a multitude of lobes365. As best shown in FIG. 5A, which is for illustrative purposesshowing the radially extending features 360 a-d exploded from thecylindrically shaped body 351, each of the radially extending features360 a-d has three lobes 365 spaced about a circumference of thecylindrically shaped body 351. Each of the lobes 365 is deflectable andflexible and resilient such that each lobe 365 bends or deflectsrelative to the cylindrically shaped body 351 when the glenoid implant310 is installed (e.g., when the peripheral pegs 350 are positioned intheir respective peripheral bores of the prepared glenoid of thepatient). In some such implementations, each of the lobes 365 deflectsand/or deforms when engaged by cortical bone of the prepared glenoid ofthe patient during installation.

The lobes 365 are spaced about the circumference of the cylindricallyshaped body 351 such that one or more channels 370 are formed betweenthe lobes 365. As best shown in FIGS. 4A and 5A-5B, the one or morechannels 370 includes three channels, where each of the three channels370 has a generally helical path about the central axis X_(P1) of theperipheral peg 350. Further, the lobes 365 of each radially extendingfeature 360 are angularly offset from the lobes 365 of each directlyadjacent radially extending feature 360, which contributes to thegenerally helical shape of the channels 370.

As best shown in FIGS. 4D-4G, which are cross-sectional views througheach of the four radially extending features 360 a-d shown in FIG. 4B,the first radially extending feature 360 a (FIG. 4D) has three lobes 365a 1, 365 a 2, and 365 a 3, that have a first rotational orientationabout the central axis X_(P1). The second radially extending feature 360b (FIG. 4E) has three lobes 365 b 1, 365 b 2, and 365 b 3, that have asecond rotational orientation about the central axis X_(P1), where thesecond rotational orientation (FIG. 4E) is angularly offset from thefirst rotational orientation (FIG. 4D). The third radially extendingfeature 360 c (FIG. 4F) has three lobes 365 c 1, 365 c 2, and 365 c 3,that have a third rotational orientation about the central axis X_(P1),where the third rotational orientation (FIG. 4F) is angularly offsetfrom the first rotational orientation (FIG. 4D) and from the secondrotational orientation (FIG. 4E). The fourth radially extending feature360 d (FIG. 4G) has three lobes 365 d 1, 365 d 2, and 365 d 3, that havea fourth rotational orientation about the central axis X_(P1), where thefourth rotational orientation (FIG. 4G) is angularly offset from thefirst rotational orientation (FIG. 4D), from the second rotationalorientation (FIG. 4E), and from the third rotational orientation (FIG.4F). The rotational orientations are highlighted/illustrated for each ofthe radially extending feature 360 a-d with three dashed lines thatextend from a center point through the middle of each of the respectivethree lobes.

Referring to FIG. 5B, an enlarged view of one of the radially extendingfeatures 360 is shown exploded from the cylindrically shaped body 351 tobetter illustrate the radially extending features 360 and the lobes 365.As shown, each of the lobes 365 has an upper surface 366 a, an opposinglower surface 366 b, an outer edge surface 366 c, and shared sidesurfaces 366 d. The shared side surfaces 366 d are shared between twodirectly adjacent ones of the lobes 365. Further, the shared sidesurfaces 366 d are defined by the helical channels 370.

The lobes 360 and the helical channels 370 provide surfaces, grooves,and/or undercuts for engaging and/or holding bone cement (not shown) foruse in securing the peripheral pegs 350 to the peripheral bores (notshown) in the prepared glenoid of the patient. In some implementations,the peripheral pegs 350 are not secured to the peripheral bores withbone cement. Rather, in some such implementations, the radiallyextending features 360 engage cancellous bone of the prepared glenoidand provide a sufficient amount of retention and/or pressurization suchthat bone cement is not needed between the peripheral pegs 350 and theperipheral bores in the prepared glenoid of the patient.

As best shown in FIG. 3, each of the peripheral pegs 350 has aheight/length and a maximum outer diameter. The height of each of theperipheral pegs 350 is less than the height of the central peg 330. Insome implementations, the height of each of the peripheral pegs 350 isless than seventy-five percent of the height of the central peg 330. Insome implementations, the height of each of the peripheral pegs 350 isless than sixty percent of the height of the central peg 330. In someimplementations, the height of each of the peripheral pegs 350 is lessthan fifty percent of the height of the central peg 330. In someimplementations, the height of each of the peripheral pegs 350 isbetween two millimeters and about twenty millimeters. In some otherimplementations, the height of each of the peripheral pegs 350 isbetween five millimeters and about fifteen millimeters. In someimplementations, the height of each of the peripheral pegs 350 is abouteight millimeters.

In some implementations, the maximum outer diameter of each of theperipheral pegs 350 (including the radially extending features 360) isgreater than the maximum outer diameter of the central peg 330(including the fins 340) (e.g., five percent greater, ten percentgreater, fifteen percent greater, twenty percent greater, thirty percentgreater, fifty percent greater, etc.). In some implementations, themaximum outer diameter of each of the peripheral pegs 350 (including theradially extending features 360) is between about one millimeter andabout fifteen millimeters. In some other implementations, the maximumouter diameter of each of the peripheral pegs 350 (including theradially extending features 360) is between about three millimeters andabout eight millimeters. In some other implementations, the maximumouter diameter of each of the peripheral pegs 350 (including theradially extending features 360) is between about four millimeters andabout six millimeters. In some implementations, the outer diameter ofthe cylindrically shaped body 351 of each of the peripheral pegs 350 isgreater than the outer diameter of the cylindrically shaped body 331 ofthe central peg 330 (e.g., five percent greater, ten percent greater,fifteen percent greater, twenty percent greater, thirty percent greater,fifty percent greater, etc.).

A method of installing the glenoid implant 310 of the present disclosureinto a prepared glenoid of a patient is now described. Initially, thenatural glenoid of the patient is prepared using techniques and/or toolsto shave the natural glenoid such that a mating surface or an exteriorsurface of the natural glenoid generally corresponds with the convexsurface 324 of the glenoid implant 310. The preparation further includesdrilling a central bore in the natural glenoid that receives the centralpeg 330. The preparation further includes, using, for example, a drillguide, to drill a set of peripheral bores in the natural glenoid thatreceive respective ones of the three peripheral pegs 350. With thenatural glenoid so prepared, the glenoid implant 310 is ready to beinstalled.

Bone cement is applied to at least a portion of the central peg 330.Bone cement can also be applied to at least a portion of the convexsurface 324, but in some implementations, bone cement is not applied tothe convex surface 324. Further, bone cement can also be applied to atleast a portion of one or more of the peripheral pegs 350, but in someimplementations, bone cement is not applied to any of the peripheralpegs 350.

With the bone cement applied to the at least a portion of the centralpeg 330, using a tool to hold the glenoid implant 310, the glenoidimplant 310 is fully installed/seated against the prepared glenoid wherethe glenoid implant is positioned such that (1) at least a portion ofthe convex surface 324 directly engages the mating surface of theprepared glenoid, (2) the central peg 330 is positioned within thecentral bore of the prepared glenoid, and (3) each of the three ofperipheral pegs 350 is positioned within a respective one of theperipheral bores of the prepared glenoid. During this installation, thetip portion 332 of the central peg 330 first engages and enters thecentral bore of the prepared glenoid. Then the tip portions 352 of eachof the peripheral pegs 350 engage and enter their respective peripheralbores of the prepared glenoid. As the peripheral pegs 350 are moved intothe peripheral bores, the lobes 365 of at least a portion of theradially extending features 360 are directly engaged by cortical bone ofthe prepared glenoid, which causes the lobes 365 to deflect and/or bendrelative to the cylindrically shaped body 351 of the respectiveperipheral peg 350. In some such implementations, the lobes 365 alsodeform (e.g., plastic deformation) and take a hook and/or barb shapethat engages the cancellous bone of the prepared glenoid when theglenoid implant 310 is fully installed (e.g., when all of or a majorityportion of the convex surface 324 directly engages the mating surface ofthe prepared glenoid).

With the glenoid implant 310 fully installed/seated, the tool holdingthe glenoid implant 310 is disengaged therefrom prior to the bone cementbetween the central peg 330 and the central bore having an opportunityto cure (e.g., harden). The fully installed/seated position of theglenoid implant 310 relative to the prepared glenoid is, however,maintained without use of the tool or any other tool, by way of theradially extending features 360 of the three of peripheral pegs 350,which engage the cancellous bone of the prepared glenoid and provide asufficient amount of self-pressurization such that (1) the bone cementbetween the central peg 330 and the central bore of the prepared glenoidcan cure without an external force holding the glenoid implant 310 inposition, (2) the bone cement, if applied thereto, between the at leasta portion of the convex surface 324 and the mating surface of theprepared glenoid can cure without an external force holding the glenoidimplant 310 in position, and (3) the bone cement, if applied thereto,between the at least a portion of the one or more of the peripheral pegs350 and the respective peripheral bores of the prepared glenoid can curewithout an external force holding the glenoid implant 310 in position.

Generally referring to FIGS. 6A-H, a method of making the glenoidimplant 310 of the present disclosure is now described. A block ofmaterial (e.g., a cube of plastic) is provided and milled into a stockglenoid component. The stock glenoid component has the body 320 with theconcave surface 322, the convex surface 324, and the edge surface 326.The block of material is further milled such that the stock glenoidcomponent further includes the central peg 330 extending from thecentral area 325 a of the convex surface 324. The block of material isfurther milled such that the stock glenoid component further includesthree peripheral peg blanks extending from and integral with (i.e.,monolithic) the peripheral area 325 b of the convex surface 324. Each ofthe peripheral peg blanks is generally a cylindrical piece of material.Each of the peripheral peg blanks is milled, using one or more tools 500(FIG. 6A), to form a portion of the cylindrically shaped body 351, thetip portion 352, and a generally cylindrical portion 400, as shown inFIG. 6B.

With the peripheral peg blanks so formed (FIG. 6B), the generallycylindrical portion 400 of the peripheral peg blanks is cut and/ormilled, using one or more tools 500 (FIG. 6C), to create a portion ofthe cylindrically shaped body 351 and a multitude of radially extendingdisks 410 that extend from the cylindrically shaped body 351, as shownin FIGS. 6C and 6D. With the radially extending disks 410 so formed, oneor more tools 500 (FIGS. 6E and 6G) is moved in one or more helicalpaths with respect to the central axis X_(P) of the peripheral peg blankto cut and/or mill the created radially extending disks 410, therebymodifying each of the radially extending disks 410 to have the threelobes 365 (FIG. 6H). In some such implementations, the one or more tools500 are moved in three separate and distinct helical paths with respectto the central axis X_(P) of the peripheral peg blank to create thehelical channels 370 and the three lobes 365 of each of the radiallyextending features 360.

Alternatively to the one or more tools 500 being moved in one or morehelical paths, the one or more tools 500 and/or or one or more differenttools can be moved in a variety of other paths to cut and/or mill eachof the created radially extending disks 410 into three separate anddistinct lobes. In some such implementations, the one or more tools 500are moved vertically with respect to the central axis X_(P) of theperipheral peg blank to create and/or cut three vertical channels (notshown) in a first one of the radially extending disks 410. As such, thethree vertical channels in the first radially extending disk 410 have afirst rotational orientation. Then the one or more tools arerepositioned and moved vertically with respect to the central axis X_(P)of the peripheral peg blank to create and/or cut three vertical channels(not shown) in a second one of the radially extending disks 410 suchthat the three vertical channels in the second radially extending disk410 are angularly offset from the three vertical channels created in thefirst radially extending disk 410. This process can continue for theother radially extending disks 410 such that each of the radiallyextending disks 410 is cut into three lobes or three portions where thethree lobes of each radially extending disk 410 are angularly offset ascompared with the three lobes created in the other radially extendingdisks 410.

Any tool or tools are contemplated for use in making/creating theglenoid implant 310, such as, for example, a milling machine, a lathemachine, a burr, a drill bit, a threaded die, a multi-lead threaded die,a robotic arm, a chisel, or any combination thereof.

Now referring to FIGS. 7A-7I, the humeral stem implant 110 includes alower stem portion 120, an upper stem portion 130, a first pair of fins140 a, a second pair of fins 140 b, and a biologic ingrowth coating 180.The lower stem portion 120 includes a generally cylindrical portion 122that has a central axis, X_(S), which is also referred to generally asthe central axis of the lower stem portion 120 or as the central axis ofthe humeral stem implant 110. The lower stem portion 120 is generallysmooth and free from the biologic ingrowth coating 180.

The upper stem portion 130 extends from the lower stem portion 120. Insome implementations, the upper stem portion 130 and the lower stemportion 120 are monolithic and formed from the same block of material.The upper stem portion 130 has the tapered face 132 that is angledrelative to the central axis, X_(S), of the lower stem portion 120. Theangle of the tapered face 132 relative to the central axis, X_(S), ofthe lower stem portion 120 is between about fifteen degrees to aboutseventy-five degrees. In some implementations, the angle of the taperedface 132 relative to the central axis, X_(S), of the lower stem portion120 is between about thirty degrees to about sixty degrees. In someimplementations, the angle of the tapered face 132 relative to thecentral axis, X_(S), of the lower stem portion 120 is about forty-fivedegrees.

The interior bore 135 (FIGS. 2A, 7A, and 7C) is formed in the upper stemportion 130. As described above, the interior bore 135 is for engagingthe first end portion 212 a (FIGS. 2A and 2B) of the humeral neckimplant component 210 in a taper lock configuration (e.g., a morse taperlock). The interior bore 135 extends inward from the tapered face 132and tapers inwardly in an inward direction along a central axis of theinterior bore 135 from the tapered face 132.

While the humeral stem implant 110 can be installed in both the preparedleft humerus bone of a patient and the prepared right humerus bone of apatient, the discussion below assumes that the humeral stem implant 110is installed in a prepared left humerus bone of a patient. The firstpair of fins 140 a is coupled to a posterior portion 130 a of anexterior surface of the upper stem portion 130 and the second pair offins 140 b is coupled to an anterior portion 130 b of the exteriorsurface of the upper stem portion 130. Further, in a medial directionfrom the central axis X_(S), a medial portion 130 c of the exteriorsurface of the upper stem portion 130 is positioned between theposterior portion 130 a and the anterior portion 130 b and in a lateraldirection from the central axis X_(S), a lateral portion 130 d (FIG. 7B)of the exterior surface of the upper stem portion 130 is positionedbetween the posterior portion 130 a and the anterior portion 130 b.

As best shown in FIGS. 7C and 7D, the first pair of fins 140 a includesa first fin 141 a and a second fin 151 a. Similarly, the second pair offins 140 b includes a first fin 141 b and a second fin 151 b. The secondpair of fins 140 b is a mirror image of the first pair of fins 140 aover a central plane bisecting the humeral stem implant 110 through thecentral axis X_(S). Although in some implementations, the second pair offins 140 b differs from the first pair of fins 140 a.

As best shown in FIGS. 7D and 7F, the first fin 141 a of the first pairof fins 140 a has a central axis X_(F1A), that is at an angle, θ_(1A),with respect to the central axis X_(S), and/or vertical, where theangle, θ_(1A), can be any angle, such as, for example, between aboutfive degrees and about thirty degrees. In some implementations, theangle, θ_(1A), is between about ten degrees and about fifteen degrees.Similarly, the first fin 141 b of the second pair of fins 140 b has acentral axis X_(F1B), that is at an angle, θ_(1B), with respect to thecentral axis X_(S), and/or vertical, where the angle, θ_(1B), can be anyangle, such as, for example, between about five degrees and about thirtydegrees. In some implementations, the angle, θ_(1B), is between aboutten degrees and about fifteen degrees.

The first fin 141 a of the first pair of fins 140 a has a firstheight/length and is attached to the posterior portion 130 a of anexterior surface of the upper stem portion 130 at three separate anddistinct locations such that the first fin 141 a is rigidly connected tothe upper stem portion 130. Such a three point coupling also results inthe first fin 141 a forming two windows 142 a and 143 a that can receivea suture therethrough for use in suturing and/or pulling bone and/orflesh towards the humeral stem implant 110 during installation of theshoulder implant system 100. Alternatively or additionally, the twowindows 142 a and 143 a also provide locations for bone to grow through,which can aid in retaining the humeral stem implant 110 in place.

Similarly, the first fin 141 b of the second pair of fins 140 b has afirst height/length and is attached to the anterior portion 130 b of anexterior surface of the upper stem portion 130 at three separate anddistinct locations such that the first fin 141 b is rigidly connected tothe upper stem portion 130. Such a three point coupling also results inthe first fin 141 b forming two windows 142 b and 143 b that can receivea suture therethrough for use in suturing and/or pulling bone and/orflesh towards the humeral stem implant 110 during installation of theshoulder implant system 100. Alternatively or additionally, the twowindows 142 b and 143 b also provide locations for bone to grow through,which can aid in retaining the humeral stem implant 110 in place.

The height/length of the first fin 141 a and the first fin 141 b can bebetween about twenty percent and about sixty percent of a total heightof the humeral stem implant 110. In some implementations, theheight/length of the first fin 141 a and the first fin 141 b is betweenabout thirty percent and about fifty percent of the total height of thehumeral stem implant 110. In some implementations, the height/length ofthe first fin 141 a and the first fin 141 b is about forty percent ofthe total height of the humeral stem implant 110. In someimplementations, the height/length of the first fin 141 a and the firstfin 141 b is between about fifteen millimeters and about fortymillimeters. In some implementations, the height/length of the first fin141 a and the first fin 141 b is between about twenty millimeters andabout thirty millimeters. In some implementations, the height/length ofthe first fin 141 a and the first fin 141 b is about twenty-fivemillimeters.

As best shown in FIGS. 7C and 7G, the second fin 151 a of the first pairof fins 140 a has a central axis X_(F2A), that is at an angle, θ_(2A),with respect to the central axis X_(S), and/or vertical, where theangle, θ_(2A), can be any angle, such as, for example, between abouttwenty degrees and about forty degrees. In some implementations, theangle, θ_(2A), is between about twenty-five degrees and about thirtydegrees. Similarly, the second fin 151 b of the second pair of fins 140b has a central axis X_(F2B), that is at an angle, θ_(2B), with respectto the central axis X_(S), and/or vertical, where the angle, θ_(2B), canbe any angle, such as, for example, between about twenty degrees andabout forty degrees. In some implementations, the angle, θ_(2B), isbetween about twenty-five degrees and about thirty degrees.

The differing angles of the first fins 141 a, 141 b as compared to thesecond fins 151 a, 151 b aids in preventing rotation of the humeral stemimplant 110 when positioned in a humeral cavity of the prepared humerusbone of the patient by engaging cancellous bone at varying angles.

The second fin 151 a of the first pair of fins 140 a has a secondheight/length (e.g., that is smaller than the first height of the firstfin 141 a) and is attached to the posterior portion 130 a of an exteriorsurface of the upper stem portion 130 at two separate and distinctlocations such that the second fin 151 a is rigidly connected to theupper stem portion 130. Such a two point coupling also results in thesecond fin 151 a forming one window 152 a that can receive a suturetherethrough for use in suturing and/or pulling bone and/or fleshtowards the humeral stem implant 110 during installation of the shoulderimplant system 100. Alternatively or additionally, the window 152 a alsoprovides a location for bone to grow through, which can aid in retainingthe humeral stem implant 110 in place.

Similarly, the second fin 151 b of the second pair of fins 140 b has asecond height/length (e.g., that is smaller than the first height of thefirst fin 141 b) and is attached to the anterior portion 130 b of anexterior surface of the upper stem portion 130 at two separate anddistinct locations such that the second fin 151 b is rigidly connectedto the upper stem portion 130. Such a two point coupling also results inthe second fin 151 b forming one window 152 b that can receive a suturetherethrough for use in suturing and/or pulling bone and/or fleshtowards the humeral stem implant 110 during installation of the shoulderimplant system 100. Alternatively or additionally, the window 152 b alsoprovides a location for bone to grow through, which can aid in retainingthe humeral stem implant 110 in place.

The height/length of the second fin 151 a and the second fin 151 b canbe between about five percent and about thirty-five percent of a totalheight of the humeral stem implant 110. In some implementations, theheight/length of the second fin 151 a and the second fin 151 b isbetween about fifteen percent and about twenty-five percent of the totalheight of the humeral stem implant 110. In some implementations, theheight/length of the second fin 151 a and the second fin 151 b is abouttwenty percent of the total height of the humeral stem implant 110. Insome implementations, the height/length of the second fin 151 a and thesecond fin 151 b is between about five millimeters and about twentymillimeters. In some implementations, the height/length of the secondfin 151 a and the second fin 151 b is between about ten millimeters andabout fifteen millimeters. In some implementations, the height/length ofthe second fin 151 a and the second fin 151 b is about twelvemillimeters.

As best shown in FIGS. 7H and 7I, which are cross-sectional viewsthrough the first fin 141 a (FIG. 7E) at two different heights along thefirst fin 141 a to illustrate the difference in the body of the firstfin 141 a along its height/length. Specifically, an upper portion of thefirst fin 141 a has a generally square cross-sectional with roundedcorners (FIG. 7H), whereas the lower portion of the first fin 141 a hasa wedge shaped cross-section with a rounded edge 145 (FIG. 7I). As such,the wedge shape of the lower portion of the first fin 141 a directlyengages and compacts cancellous bone in the prepared humeral bone of thepatient during installation of the humeral stem implant 110. When thehumeral stem implant 110 is fully installed (e.g., the tapered face 132is about flush with the cut humerus bone or the osteotomy cut surface),such a compacting of the cancellous bone by the first fin 141 a aids inpreventing rotation of the humeral stem implant 110. Similarly, portions(e.g., lower portions) of the first fin 141 b and of the second fin 151a and the second fin 151 b, can include the same, or similar, wedgeshape to also engage and compact cancellous bone. Further, the entirebody of each of the fins 141 a, 141 b, 151 a, 151 b can have a wedgeshaped cross-section. In some implementations, the wedge shapedcross-section forms a sharp edge or a knife edge (e.g., instead of therounded edge 145) to aid in the cutting of cancellous bone duringinstallation of the humeral stem implant 110.

As best shown in FIGS. 7A-7D, the biologic ingrowth coating 180 isattached to a majority portion of the exterior surface of the upper stemportion 130. In some implementations, the biologic ingrowth coating 180extends downward from the tapered face 132 and past or beyond the firstfin 141 a and the first fin 141 b. In some implementations, the biologicingrowth coating 180 extends downward from the tapered face 132 and atleast 1 millimeter past or beyond the first fin 141 a and the first fin141 b. As shown, the biologic ingrowth coating 180 is not attached tothe tapered face 132, the lower stem portion 120, the first pair of fins140 a, and the second pair of fins 140 b. Alternatively, the biologicingrowth coating 180 may be attached to a portion of one or more of: (i)the tapered face 132, (ii) the lower stem portion 120, (iii) the firstpair of fins 140 a, and (iv) the second pair of fins 140 b. The biologicingrowth coating 180 is a very porous material that is attachedgenerally to the upper stem portion 130. In some implementations, thebiologic ingrowth coating 180 is a porous, porous material where thepores of the material also have pores. The biologic ingrowth coating 180is generally attached to the humeral stem implant 110 to promoteosseointegration of the humeral stem implant 110 with the preparedhumeral bone of the patient.

In some implementations, the upper stem portion 130 of the humeral stemimplant 110 includes a notch 190 (FIGS. 7A, 7C, and 7E). The notch 190is positioned adjacent to (e.g., below) the tapered face 132 in themedial portion 130 c of the exterior surface of the upper stem portion130. The notch 190 is sized and shaped to be engaged by a tip of a stemextractor tool (not shown) to remove the humeral stem implant 110 fromthe humeral canal of the prepared humerus bone of the patient subsequentto being seated/installed therein.

It is expressly contemplated that any element or elements from any oneor more of the claims enumerated herein can be combined with any otherelement or elements in any of the other claims to form a contemplatedimplementation of the present disclosure.

Each of the above implementations and obvious variations thereof iscontemplated as falling within the spirit and scope of the claimedinvention, which is set forth in the following claims.

1-36. (canceled)
 37. A glenoid implant to be coupled with a preparedglenoid of a patient, the glenoid implant comprising: a body having: aconcave surface configured to engage a humeral head implant component,and a convex surface configured to engage a mating surface of theprepared glenoid of the patient, the convex surface having a peripheralarea surrounding a central area; a central peg extending from thecentral area of the convex surface, the central peg being configured tobe cemented to a central bore of the prepared glenoid of the patient;and a peripheral peg extending from the peripheral area of the convexsurface, the peripheral peg having a first set of resilient lobes at afirst longitudinal position of the peripheral peg and a second set ofresilient lobes at a second longitudinal position of the peripheral pegthat is spaced from the first longitudinal position.
 38. The glenoidimplant of claim 37, wherein the first set of resilient lobes has afirst rotational orientation about the peripheral peg and the second setof resilient lobes has a second rotational orientation about theperipheral peg that is angularly offset from the first rotationalorientation.
 39. The glenoid implant of claim 37, wherein each of thefirst set of resilient lobes and each of the second set of resilientlobes is configured to deform and deflect when initially engaged bycortical bone during installation of the glenoid implant in the preparedglenoid, and wherein upon final seating of the glenoid implant in theprepared glenoid, each of the first set of resilient lobes and each ofthe second set of resilient lobes is configured to engage withcancellous bone of the prepared glenoid.
 40. The glenoid implant ofclaim 37, wherein the peripheral peg has a maximum outer diameter thatis larger than a maximum outer diameter of the central peg.
 41. Theglenoid implant of claim 37, wherein the first set of resilient lobesincludes three lobes that are spaced about a circumference of theperipheral peg in a first rotational orientation and the second set ofresilient lobes includes three lobes that are spaced about thecircumference of the peripheral peg with a second rotational orientationthat is angularly offset from the first rotational orientation. 42.(canceled)
 43. The glenoid implant of claim 37, wherein the central peghas a first length and the peripheral peg has a second length that isless than the first length.
 44. The glenoid implant of claim 43, whereinthe peripheral peg has a maximum outer diameter that is larger than amaximum outer diameter of the central peg.
 45. The glenoid implant ofclaim 37, responsive to the glenoid implant being coupled with theprepared glenoid such that (i) at least a portion of the convex surfacedirectly engages a mating surface of the prepared glenoid, (ii) thecentral peg is positioned within a central bore of the prepared glenoid,and (iii) the peripheral peg is positioned within a peripheral bore ofthe prepared glenoid, the first set of resilient lobes and the secondset of resilient lobes are configured to engage cancellous bone of theprepared glenoid and provide a sufficient amount of self-pressurizationsuch that bone cement between the central peg and the central bore cancure without an external force holding the glenoid implant in position.46. (canceled)
 47. The glenoid implant of claim 41, further comprising asecond peripheral peg extending from the peripheral area of the convexsurface, the second peripheral peg having a third set of resilient lobesat a first longitudinal position of the second peripheral peg and afourth set of resilient lobes at a second longitudinal position of thesecond peripheral peg that is spaced from the first longitudinalposition of the second peripheral peg, the third set of resilient lobesincluding three lobes that are spaced about a circumference of thesecond peripheral peg in the first rotational orientation, the fourthset of resilient lobes including three lobes that are spaced about thecircumference of the second peripheral peg with the second rotationalorientation. 48-49. (canceled)
 50. The glenoid implant of claim 41,wherein for each of the first and second sets of resilient lobes, thethree lobes are spaced generally equally about the circumference of theperipheral peg.
 51. (canceled)
 52. The glenoid implant of claim 45,wherein the first set of resilient lobes and the second set of resilientlobes are further configured to provide a sufficient amount ofself-pressurization such that bone cement between the central peg andthe central bore can cure with the at least a portion of the convexsurface maintaining its direct engagement with the mating surface of theprepared glenoid without the external force. 53-55. (canceled)
 56. Amethod of making a glenoid implant, the method comprising: providing astock glenoid component including: (i) a body having a first side with aconcave surface and a second opposing side with a convex surface, theconvex surface having a peripheral area surrounding a central area; (ii)a central peg extending from the central area of the convex surface; and(iii) a peripheral peg extending from the peripheral area of the convexsurface, the peripheral peg having a generally cylindrical portion;cutting, via at least one of one or more tools, the generallycylindrical portion of the peripheral peg, thereby creating a pluralityof radially extending disks; and cutting, via at least one of the one ormore tools, the created plurality of radially extending disks in one ormore helical patterns with respect to a central axis of the peripheralpeg, thereby modifying each of the plurality of radially extending disksto have three lobes that are spaced about a circumference of theperipheral peg.
 57. The method of claim 56, wherein the cutting thecreated plurality of radially extending disks in the one or more helicalpatterns with respect to the central axis of the peripheral peg resultsin the three lobes of a first one of the modified plurality of radiallyextending disks having a first rotational orientation and the threelobes of a second one of the modified plurality of radially extendingdisks having a second rotational orientation that is angularly offsetfrom the first rotational orientation.
 58. The method of claim 56,wherein each of the three lobes is configured to deform and deflect wheninitially engaged by cortical bone during installation of the glenoidimplant in a prepared glenoid, and wherein upon final seating of theglenoid implant in the prepared glenoid, each of the three lobes isconfigured to engage with cancellous bone of the prepared glenoid. 59.The method of claim 56, wherein the one or more tools include a millingmachine, a lathe machine, a burr, a drill bit, a threaded die, amulti-lead threaded die, a robotic arm, a chisel, or any combinationthereof.
 60. A method of installing a glenoid implant in a preparedglenoid of a patient, the prepared glenoid having a mating surface, acentral bore, and a plurality of peripheral bores, the methodcomprising: providing a glenoid implant including: (i) a body having afirst side with a concave surface and a second opposing side with aconvex surface, the convex surface having a peripheral area surroundinga central area; (ii) a central peg extending from the central area ofthe convex surface; and (iii) a plurality of peripheral pegs extendingfrom the peripheral area of the convex surface, each of the peripheralpegs having at least one radially extending feature; applying bonecement to at least a portion of the central peg; positioning, via atleast one of one or more tools, the glenoid implant such that: (i) atleast a portion of the convex surface directly engages the matingsurface of the prepared glenoid, (ii) the central peg is positionedwithin the central bore of the prepared glenoid, and (iii) each of theplurality of peripheral pegs is positioned within a respective one ofthe peripheral bores of the prepared glenoid; disengaging the at leastone of the one or more tools from the glenoid implant prior to the bonecement applied to the at least a portion of the central peg curing; andmaintaining, while the bone cement cures, the position of the glenoidimplant relative to the prepared glenoid via the at least one radiallyextending feature of the plurality of peripheral pegs.
 61. The method ofclaim 60, further comprising, prior to the positioning, applying bonecement to at least a portion of the convex surface.
 62. The method ofclaim 60, wherein bone cement is not applied to the plurality ofperipheral pegs prior to the positioning. 63-67. (canceled)